ALK and mature T-cell and NK-cell non-Hodgkin lymphoma: Interim scans from 43 patients with anaplastic lymphoma kinase-negative PTCL from the ‘Positron Emission Tomography-Guided Therapy of Aggressive Non-Hodgkin Lymphomas’ trial were re-analyzed by qPET (relating residual lymphoma-related uptake to liver uptake) and ∆SUVmax (relating interim scan to baseline scan).